Belt sanding-machine.



C. L. MATTISON.

BELT SANDING MACHINE.

APPLICATION FILED 0GT.17, 1914:`

1 1 24,3 1 1, Patented Jan. 12, 1915.

3 SHEETS-SHEET 1.

wf @mf-Mm? 0.1L. MATTISON.. v131m? SANDING MACHINE. u APPLIOTION FILEDoef-1317, 1914. I 15,1 1 l l Patented Jan. 12, 1915.

3 SHEETS-SHEET 2.

TH: NURRIS PLILNS CO., PHOTO-LITHQ, WASHINGTON, D. C.

C. L. MATTISON.

BELT SANDING MACHINE.

APPLICATION FILED 00T. 17, 1914. 1,124,31 1, Patented Jan.12,1915.

3 SHEETS-SHEETS.

I?? 665 e6 ,Zz M612 fr:

y earner ernten.

CARL LAWRENCE MATTISON, CF BELOIT, VISCONSIN, ASSIGNOR TO C. MATTISONMACHINE WORKS, 0F BELOIT, WISCONSIN, A. CORPORATION 0F WISCONSIN.

BELT SANDING-IVIACHNE.

Specification of Letters Patent.

Patented J an. 12, 1915.

Application filed October 17, 1914. Serial No. 867,081.

To all whom t may concern:

Be it known that I, CARL LAWRENCE Mar- TrsoN, a citizen of the UnitedStates, residing at Beloit, in the county of Rock and State oflVisconsin, have made certain new and useful Improvements in BeltSanding- Machines, of which the following is a spec1- fication.

llhe object of this invention is to produce a belt sander adapted tosand relatively small curved surfaces such as those found on scrollwork, polygonal turnings and the like.

In the accompanying drawings Figure 1 is a side elevation of a machineembodying the features of my invention. Fig. 2 1s a plan view of theturret head carrying a plurality of forms, the sand belt being shown insection and a piece of work being illustrated in operative position.Fig. 3 is aside elevation of the turret head. Figs. 4 and 5 are side andplan views, respectively, of a locking collar for positioning the turrethead. Figs. 6 and 7 illustrate the operation of the collar. Figs. 8 and9 are front and side views, respectively, of an alternative form ofturret head. Fig. 1() is a section on line 10-10 of Fig. 8.

In the embodiment herein shown of the invention, the sand belt 1 (whichis usually comparatively narrow, say two inches in width) is supportedso that the operating portion thereof travels vertically. The framework2 of the machine is of upright character, its lower portion 3constituting a base adapted to rest upon the floor. In the lower portionof the frame 2 is mounted the main horizontal shaft 4. Upon one end ofthe shaft is secured a drive pulley 5 and upon the opposite end of theshaft is fixed the sand-belt driving-wheel 6. At the upper end of theframe 2 is a sand-belt-carrying idler-wheel 7 which may be flanged asshown. rifhe belt 1 is kept under proper tension by suitable means, as,for example, an idler pulley 8 which is rotatably mounted upon an arm 9,said arm being fixed to one end ofa short shaft 10 which is journaled inthe frame 2. Fixed to the opposite end of the shaft 10 is a weighted arm11 which keeps the wheel 8 pressed against the belt.

The work may be supported in any suitable way. Herein I have shown aworktable 12 which is adjustably mounted upon an arm 13 that is carriedby the frame 2.

14 is a slot in the table 12 through which the sand belt extends.Located below the table 12 is aguide 16 for the sand belt. Above thetable 12 is a guide for the sand belt, said guide comprising a bar 17 ofwood or the like, said bar being secured in vertical position in a clamp18 which is carried by a horizontal extensible arm 19. The arm 19 isfixed upon the upper end of an arbor 20, said arbor being fixed in anarm 21 forming a portion of the frame 2. In the forward side of the bar17 is a groove 17a through which the belt 1 travels.

To support the sand belt 1 against the pressure of the work, provide oneor more forms suitably shaped with reference to the kinds of surface tobe sanded. in order that all the surfaces of a piece of work may besanded before the sanding of another piece is commenced, I provide meansfor supporting a plurality of forms in such a manner that the operatormay readily bring any one of those forms into position for use. In Figs.1, 2 and 3 I have shown a turret head consisting of a hub 22 mounted forrotation in a horizontal plane upon the lower end of the arbor 20, saidhub having fixed thereto a suitable number of arms 23, which arms may,if desired, be made ad* justable in length. To the outer end of each arm23 is fixed a clamp 24 for holding a wooden form. In the drawings thedifferent forms are indicated by the letters a, Z2, c and (Z.

The turret head is supported against downward displacement by a collar25 fixed upon the lower end of the arbor 20. Upon the upper side ofksaid collar are V-shaped projections 26 which are adapted to lie insimilarlyeshaped recess 27 in the lower end of the hub 22 for thepurpose of holding said hub in adjusted position. While the projections26 are sufiicient to hold the turret head against casual displacement,the turret head may be easily swung by the operator to bring any one ofthe forms into position behind the sand belt. When the operator thusturns the turret head, the latter first rises so that the hub 22 rideson the projections 26, the head descending upon the completion of aquarter revolution. The forms are so secured within the clamps 24: thatwhen the turret head is in its lower position the lower end of the formlies within the slot 14, and when the turret head rises the form israised out of the slot so that the form can move over the top of thetable.

In Figs. 8 and 9 is shown a turret head revolving upon a horizontalaxis. To the arm 21a of the machine frame, is secured a downwardlyextending bracket 28 in the lower end of which is rotatably mounted ahorizontal arbor 29. Fixed to the arbor 29 is a hub; 22a. which carriesadjustable arms 23a. Each arm 23ZL is provided with a clamp 24a forholding a form a, b, c or d. The table 12?.i has a slot 142.1 therein,through which the sand belt l extends and through which the forms. moveas the turret head is rotated. The forms are secured in the clamps 24ain such a manner that the lower portions of the forms extend into theslot 14a when the forms are in operative position. The turret head isyieldingly locked to hold a given form in operative position by means ofa spring-pressed locking plunger 30 carried by the lower end of thebracket 28, said plunger having a wedge-shaped inner end adapted toenter `similarly formed recesses 31 in the fixed arbor 29. It will beseen that the turret head may be rotated in one direction by merelytaking hold of one of the arms 23J1 and turning the head.

In Fig. 2 is shown a portion of a so-called scroll or colonial chairlleg L, said leg having a variety of curved surfaces. The forms ap, b, cand d are adapted to properly support the belt 1 in the operation ofsanding the various surfaces of the leg. It will be seen that theoperator may finish one surface after another, revolving the turret headto bring the desired forms into operative position, and thus completelyfinish one article before beginning work upon another. By reason of thefact that the forms extend belewthe top of the work table, the sand beltis completely supported against the pressure of the work. This featureis of especial value in the sanding of thin pieces ofwork.

Iclaim as my invention:

1. The'combination ofy an upright frame, a

sand belt, wheels on the frame for supporting said sand belt with aportion of the sand belt extending vertically, ak work-supporting tableadjacent to the belt, anda turret head revolubly mounted on the frameadjacent to said table, said head comprising form-supporting clamps.

2. The combination of a frame, a sand belt, wheels on the frame forsupporting said sand belt with a portion of the sand belt extendingvertically, a work-supporting table adjacent to the belt, and a turrethead revolubly mounted on the frame adjacent to said table, said headcomprising form-supporting clamps, said table having a space behind thebelt to receive the lower ends of the forms.

3. The combination of a frame, a sand belt, wheels on the frame forsupporting said sand belt with a portion of the sand belt extendingvertically, a work-supporting table adjacent to the belt, a turret headrevolubly mounted on the frame adjacent to said table, a guide for thebelt above the turret head, and a guide for the belt below the table.

4l. The combination of a frame, a sand belt, wheels on the frame forsupporting said sand belt, a work-supporting table adjacent to the belt,a turret head revolubly supported adjacent to said table, and means foryieldingly holding the turret head in vadj usted position.

CARL LAWRENCE MATKTisoN.

In the presence of- J. W. DowNING, E. M. IRISH.

G0191, o! thin patent may be obtained tor ahve cent: each, by addressingthe Commissioner of; Intenta Washington, 1D. G,

